I have a chaos figure and i dont know what it is. warhammer 40,000 40k?

he has a drill for a left hand and is wearing a cloak he also has a bazooka on his left shoulder, he has a mive gun in his right hand too and he has his foot on a cog who is he? im not even sure if he is from chaos army,,,, i need to know who he is so i can sell him.